Five-year-old Marco draws a picture of a train with a smiley face and sunglasses. This is an example of ______________

Working with Walter Cannon, A.L. Washburn use a balloon to show that feelings of hunger r accompanied by

A) rising blood glucose levels B) reduce secretions of ghrelin C) a rising set point D) stomach contractions

Sense receptors for smell, pressure, pain, and temperature are ________

a. extensions of sensory neurons. b. specialized cells separated from sensory neurons by synapses. c. modified glands. d. modified skin cells connected to sensory neurons.